package com.atguigu.eduservice.service.impl;

import com.alibaba.excel.EasyExcel;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.entity.subject.OneSubject;
import com.atguigu.eduservice.entity.subject.TwoSubject;
import com.atguigu.eduservice.listener.SubjectExcelListener;
import com.atguigu.eduservice.mapper.EduSubjectMapper;
import com.atguigu.eduservice.service.EduSubjectService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 课程科目 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2024-08-31
 */
@Service
public class EduSubjectServiceImpl extends ServiceImpl<EduSubjectMapper, EduSubject> implements EduSubjectService {



    @Override
    public void saveSubject(MultipartFile file, EduSubjectService subjectService) {
        try {
            //文件输入流
            InputStream in = file.getInputStream();
            //调用方法进行读取
            EasyExcel.read(in, SubjectData.class,new SubjectExcelListener(subjectService)).sheet().doRead();
        }catch(Exception e){
            e.printStackTrace();
        }
    }

    @Override
    public List<OneSubject> getAllOneTwoSubject() {
        //最终的list
        List<OneSubject> oneSubjects = new ArrayList<>();
        //查询所有一级分类
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("parent_id","0");
        List<EduSubject> oneSubjectList = baseMapper.selectList(wrapper);

        //查询所有二级分类
        QueryWrapper<EduSubject> wrapper2 = new QueryWrapper<>();
        wrapper2.ne("parent_id","0");
        List<EduSubject> twoSubjectList = baseMapper.selectList(wrapper2);

        //封装一级分类
        for (EduSubject oneSubject : oneSubjectList) {
            OneSubject oneSubject1 = new OneSubject();
            BeanUtils.copyProperties(oneSubject,oneSubject1);
            oneSubjects.add(oneSubject1);
            //封装二级分类
            List<TwoSubject> twoSubjects = new ArrayList<>();
            for (EduSubject twoSubject : twoSubjectList) {
                if(oneSubject.getId().equals(twoSubject.getParentId())){
                    TwoSubject twoSubject1 = new TwoSubject();
                    BeanUtils.copyProperties(twoSubject,twoSubject1);
                    twoSubjects.add(twoSubject1);
                }
            }
            oneSubject1.setChildren(twoSubjects);

        }
        return oneSubjects;
    }
}
